The correlation between onshore and offshore of the volcanic features in a complex volcanic field area is a difficult task, however, it is a fundamental step in order to better understand the geological evolution of such a complex area and for an assessment of geologic hazards.

Ischia is a well exposed and densely populated volcanic field located in the Campania volcanic province of Italy. In order to improve our understanding of the recent volcanic history of Ischia Island, high-resolution seismic reflection profiles were used to identify volcanic and sedimentary features in the northern offshore.

The volcano stratigraphy interpretation permitted us to recognize seismic units with a reflection-free/chaotic facies. These latter units have been associated with volcanic deposits and correlated to the main volcanic units outcropping on the northern coast of Ischia Island. They are limited in extent and interlayered with eight seismic units with continuous reflectors corresponding to clastic sedimentary units that were deposited during inter-eruptive phases. The main result of this work is the documentation of volcanic activity during the Holocene in the area offshore between Castello d'Ischia, Ischia Porto (mainly effusive products) and Punta della Scrofa (mainly shallow lava domes and dykes). The key volcanic units were mapped and 3D geological models were reconstructed. The reconstruction of the stratigraphic framework offshore a volcanic coast provides a pathway to the investigation of the stratigraphic relationships between inter-eruptive sedimentary deposits and volcanic units, and permits the assessment of a wide and continuous chronostratigraphic framework in a complex area. Furthermore, the onshore-offshore correlation of the main Holocene volcanic units allows us to better estimate their areal distribution, a critical factor in the hazard evaluation of a coastal volcanic area. The application of seismic volcano stratigraphy illustrates the remarkable possibilities that the study of submarine volcanic fields offers.

复杂火山场区陆上和海上火山特征的对比是一项艰巨的任务，但它是更好地了解此类复杂区的地质演化和地质灾害评估的基础步骤。

伊斯基亚是位于意大利坎帕尼亚火山省的一个暴露良好且人口稠密的火山场。为了提高我们对伊斯基亚岛近期火山历史的了解，高分辨率地震反射剖面被用来识别北部近海的火山和沉积特征。

火山地层解释使我们能够识别具有无反射/混沌相的地震单元。后面这些单元与火山沉积物有关，并与伊斯基亚岛北部海岸出露的主要火山单元相关。它们的范围有限，并与八个具有连续反射层的地震单元交错，这些地震单元对应于在喷发间期沉积的碎屑沉积单元。这项工作的主要成果是记录了 Castello d'Ischia、Ischia Porto（主要是喷发产品）和 Punta della Scrofa（主要是浅熔岩穹顶和堤坝）之间离岸地区全新世期间的火山活动。绘制了关键火山单元并重建了 3D 地质模型。火山海岸近海地层格架的重建为研究喷发间沉积沉积物与火山单元之间的地层关系提供了途径，并允许评估复杂区域中广泛而连续的年代地层格架。此外，主要全新世火山单元的陆上-海上相关性使我们能够更好地估计它们的区域分布，这是评估沿海火山区危险性的关键因素。地震火山地层学的应用说明了海底火山场研究提供的非凡可能性。并允许对复杂区域中广泛且连续的年代地层框架进行评估。此外，主要全新世火山单元的陆上-海上相关性使我们能够更好地估计它们的区域分布，这是评估沿海火山区危险性的关键因素。地震火山地层学的应用说明了海底火山场研究提供的非凡可能性。并允许对复杂区域中广泛且连续的年代地层框架进行评估。此外，主要全新世火山单元的陆上-海上相关性使我们能够更好地估计它们的区域分布，这是评估沿海火山区危险性的关键因素。地震火山地层学的应用说明了海底火山场研究提供的非凡可能性。